Nasal breathing warms and humidifies incoming air. (Air entering the nose at 42.8˚F/6˚C will be warmed to 86˚F/30˚C by the time it touches the back of the throat, and a cozy 98.6˚F/37˚C—body temperature—upon reaching its final destination, the lungs.) • Nasal breathing removes a significant amount of germs and bacteria from the air you breathe
